DE1051157B - Long stroke drive for reciprocating parts, e.g. B. slide of tool, z. B. Long grinding machines - Google Patents

Description

GERMAN

For parts to be moved back and forth over long distances, especially for working tools of tool, z. B. grinding wheels of long grinding machines, the drive would be particularly hydraulically acted upon Pistons are very advantageous, among other things, because of the simplicity of this type of drive. To have to but with the direct connection of the piston or the piston rod with the reciprocating Turn part cylinder of great length used. Especially with very large strokes, especially in the horizontal direction, the long cylinders disturb as well as the long reciprocating Piston rods considerably; This fact often makes it impossible to use this drive system; this is particularly the case when, for example, the cylinder is relatively above the machine bed survives far. In addition, long piston rods are very sensitive to buckling and must be supported once or several times if necessary.

It is already known to work with machine parts moving back and forth, for example also with slides Grinding machines, the stroke length by superimposing the movements of a main drive with that to enlarge a power take-off coupled to it. That's how it is. Stroke of a known grinding machine, which is equipped with a crank drive and where the stroke length of the reciprocating Work table is given by the crank radius, by a between the crank mechanism and the workpiece table Engaged double rack drive enlarged.

Such gear drives are not without certain disadvantages in grinding machines; they can for example may favor the development of chatter marks. Crank drives are also often inferior to the smooth, rapid operation of a piston drive.

The invention is based on a long stroke drive for reciprocating parts, in particular for carriages of tool, e.g. B. Long-lasting machines, in which arranged between one under the table guide as well as with a frame firmly connected, hydraulic piston drive and the slide a the The power take-off that increases the slide's stroke and is located on the frame is switched on, on the one hand with the slide and on the other hand with a stationary part of the machine in connection stands.

A new solution to the identified problem of increasing the stroke length is hereby according to the invention achieved that with the formation of the auxiliary drive as a cable or chain hoist, its roles with the hydraulic piston drive firmly connected and by one on the one hand attached to the carriage as well Long stroke drive for reciprocating parts, e.g. B. Carriage of tool,

z. B. Long grinding machines

Applicant:

Gustav Gockel machine factory

Company with limited liability,

Darmstadt, Mornewegstr. 37-39

Philipp Herbert, Stockstadt / Rhine,

and Georg Pfeifer, Seeheim (a. d. Bergstrasse),

have been named as inventors

on the other hand, rope or chain connected to the machine are wrapped on the Frame at least two pulleys connected by at least one endless rope are provided.

In this way, a smooth, steady and vibration-free run of the tool table is achieved. The special arrangement of the endless rope on a movable frame gives the option of without any rack and pinion connections to achieve the above-mentioned stroke-increasing effect.

However, the following should be noted regarding the state of the art:

There is already a hydraulic draw bench known, which also doubles the path length of the Drawing frame - very similar to this - the head of a hydraulic piston has a frame-like design has for receiving pulleys, which of one with the pulling carriage and one stationary Part of the machine connected rope are wrapped. As a result, the pulling trolley is provided with an according to Art a pulley with respect to the lifting movement of the piston conveyed increased motion drive. Even if the invention basically makes use of this known measure, so it is the known device is not a long-stroke drive for reciprocating parts within the meaning of the invention. This differs from the known, among other things and above all by the endless rope or the two ropes practically united to form an endless rope. First this Feature enables the reciprocating motion required to operate the machine tool of the slide, while the moving

'■: "" ■ * -. ■ <· ■ .. 809 750/60

Claims (4)

Known pull carts can only move in one direction. According to one embodiment of the invention, the endless cable pull is given its movement in that the cable pulleys of the frame roll on an auxiliary guide arranged in the machine bed parallel to the drive movement of the main drive. It is also possible to fix the piston or pistons and to connect the cylinder or cylinders, which can then be moved instead, to the roller or rollers, chain wheels or the like, or to their frame, carrier or the like. As was further found, several chains can be provided next to each other when driving with chains, guided over a corresponding number of chain wheels and expediently offset against one another in such a way that - based on an imaginary line running transversely to the direction of movement of the chains - the teeth of the chain links are staggered in the chain wheels intervention. This arrangement helps to reduce the degree of irregularity of the drive. The invention is explained below using an exemplary embodiment. At the machine bed 1 is the track 14 on which the frame 7,10 runs by means of rollers 9, 12 mounted on it at 8 and 11. The z. B. hydraulically loaded cylinder 2 with piston 2 'are about half as long as the bed 1. The stationary cylinders 2 are supplied with pressure oil via pump 4 and line 3. The piston rod 5 is attached to the frame part 7 at 6. An endless rope or chain 13 runs around the rollers 9, 12 and is fastened at 15, 16 to the attachment 17 of the carriage 18 which is slidably guided in the machine bed. With 19 the guide cheeks of the bed are designated. On the right in the figure, the right end position of the carriage 18 is shown in broken lines, with the roller 9 having reached the end of the track 20. The rollers 9, 12 roll on the web 14. Patent claims: 1. Long stroke drive for reciprocating parts, especially for slides of tool, z. B. Long grinding machines, in which between one arranged under the table guide and with a frame firmly connected, hydraulic piston drive and the slide a the The power take-off, which increases the slide's stroke and is located on the frame, is switched on which is connected on the one hand to the slide and on the other to a stationary part of the machine stands, characterized in that under known training of the secondary drive as Cable or chain hoist whose rollers (9, 12) are firmly connected to the hydraulic piston drive and one attached to the carriage (18) on the one hand and the machine (1) on the other related rope or chain (13) are wrapped on the frame (10) at least two pulleys (9, 12) connected via at least one endless rope (13) are provided. 2. Drive according to claim 1, characterized in that the pulleys (9,12) on one Roll the auxiliary guide (14) arranged in the machine bed parallel to the piston movement. 3. Drive according to claim 1 and 2, characterized in that the piston or pistons (2 ') are fixedly arranged and the cylinder or cylinders (2) is movable and connected to the roller or rollers (9, 12) are. 4. Drive according to claim 1 to 3, characterized in that a plurality of chains when driving provided by them side by side, guided over a corresponding number of sprockets and expediently are offset from one another in such a way that ■ - · based on a direction transverse to the direction of movement Imaginary line running through the chains - the teeth of the sprockets staggered into the chain links intervention. Considered publications:
German patent specifications No. 478 693, 438 595,
056, 98,529; Austrian Patent No. 166 615;
French patents nos. 916 830, 351511. 1 sheet of drawings & 809 750/60 2.59